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PlantStudio Kurtz-Fernhout Software
Developers of custom software and educational simulations.
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Changing mutation options for breeding

Breeding mutation is the amount of variation in the random selection of new plant parameters from a normal (bell-shaped) distribution. The mean (average) of the distribution is either the value from one parent or the blended value from two parents. At 100% mutation the standard deviation of the normal distribution is half of the mean. At 0% mutation there is no variation, and all offspring have exactly the same value as the mean for each parameter.

To change mutation options,
gif/plantstudio00090000.gif
Choose Custom from the breeder Variation menu.
gif/plantstudio00090000.gif Click the Mutations tab.
gif/plantstudio00090000.gif If you don't want to differentiate between parameter sections, just click on the mutation slider gif/plantstudio00000063.gif and drag to the left or right. All parameters will use the new mutation value.

-or-
gif/plantstudio00090000.gif If you want to differentiate between parameter sections, click the Sections gif/plantstudio00000064.gif button. A list of parameter sections will appear (the same list as in the main window). For each section or sections you want to set the mutation for, select the sections in the list, then drag the mutation slider gif/plantstudio00000065.gif to the left or right.

How this works with the breeder Variation menu:
gif/plantstudio00090000.gif
When you choose Low breeding variation from the breeder Variation menu, the mutation percent for all parameter sections is set to 20%. At Medium variation the mutation percent is 60%. At High variation the mutation percent is 100%.

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Updated: March 10, 1999. Questions/comments on site to webmaster@kurtz-fernhout.com.
Copyright © 1998, 1999 Paul D. Fernhout & Cynthia F. Kurtz.